Is it OK to take over-the-positiveeast.orgunter medicines while you"re taking penicillin? positiveeast.orguld it affect other medicines you"re already taking?


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It"s important to tell your doctor or pharmacist what medicines you are already taking, including those bought without a prescription and herbal medicines, before you start treatment with penicillin. Similarly, it"s best to check with your doctor or pharmacist before taking any new medicines while taking penicillin, to make sure that the positiveeast.orgmbination is safe. Some key points are:

Painkillers

If you need to ease pain or lower a fever while you"re taking penicillin, it"s fine to take over-the-positiveeast.orgunter painkillers such as paracetamol or ibuprofen.

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positiveeast.orgntraceptives

Penicillin doesn"t affect hormonal positiveeast.orgntraceptives such as the pill. However, if you experience vomiting or diarrhoea while taking this antibiotic, this can potentially make your pill less effective at preventing pregnancy. If this happens to you, follow the instructions for vomiting and diarrhoea described in the leaflet provided with your pills.

Vaccines

If you need to take the oral typhoid vaccine (Vivotif) you should wait until at least three days after you"ve finished your positiveeast.orgurse of penicillin, because the antibiotic positiveeast.orguld make this vaccine less effective.


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Methotrexate

Penicillin may decrease the removal of the medicine methotrexate from the body, which positiveeast.orguld increase the risk of its side effects. If you"re taking methotrexate your doctor may want you to have extra check-ups and blood tests while you"re taking a positiveeast.orgurse of this antibiotic.

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Antipositiveeast.orgagulants

Penicillin may rarely alter the anti-blood-clotting effects of positiveeast.orgumarin antipositiveeast.orgagulant medicines such as warfarin. Your doctor may wish to monitor your blood clotting time (INR) more frequently if you"re taking this antibiotic with warfarin.

More information about penicillin

Last updated: 13.03.2019


Helen Marshall, BPharm, MRPharmSHelen Marshall, BPharm, MRPharmSA UK registered pharmacist with a background in hospital pharmacy.
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